Now that I've had the grinder for a bit, just wanted to share some of my thoughts in case it's helpful for others. I'll focus more on the unique aspects of the grinder itself, and not focus on the burrs.

It seems well established that most (all?) the 98mm burr grinders can produce awesome coffee. The Nautilus isn't different in this aspect. The coffee I've been making has been amazing. I've made cups of coffee I couldn't have with my prior grinder, an ~8 year old Vario. But that's not necessarily unique to the Nautilus, since you can get the same burrs in other grinders too. And ultimately, it seems apparent it's the burrs that dictate how good your coffee will be. (E.g, P100 owners are also making awesome coffee with the same burrs you can find in the Nautilus.) I got the brew burrs with my Nautilus and I've been getting some great results with them.

Instead of diving into the burrs, I'll talk about the other aspects of the grinder. I'm not qualified to compare the burrs I have to any other 98mm burr set. So I'll just leave it at the new 98mm SSP brew burrs are excellent.

The visual design and finishes of the nautilus are beautiful. I got mine in the powder coated white finish, and it looks really good. There are a couple imperfections in the powder coating, but overall it's really nice. I'm really happy I went with white. All the surfaces are nice to touch. Everything is machined really well and it's apparent both by looking at it and by touching it.

The adjustment dial on the front is so so nice to turn. It feels really good, and turns so smoothly, like buttery smooth. It's effortless. In general, there's a dab more resistance as you turn finer than coarser. There is absolutely zero drift when grinding. This is to be expected with a grinder of this quality, but it's sort of surprising given how easy and smooth the dial is to turn, but there is zero movement of the grind setting as the grinder runs.

The grinder is quiet. I've been grinding on 12v from the power supply (~400rpm). Compared to my previous grinder, the quietness is night and day. To put this into practical terms, I often listen to podcasts using my iPhone's speakers when making coffee. With my previous grinder, I had to pause the podcast when grinding. With the Nautilus, there's no need.

For dosing into the grinder, I've been using Levercraft's hybrid doser/bellows. It works quite well and fits well in the hopper opening.

I've been using RDT, and I'm getting very minimal retention. Less than 0.1g. It's more likely that I encounter 1/10th of a split bean that didn't get ground, and I grind through it before my next brew, than grounds retention. I think this sometimes happens because when I RDT, parts of a broken bean can get stuck in the entrance shoot when it flies back after getting partially ground. Now that the burrs have been seasoned a bit, I'm going to see if I can skip using RDT. Regarding retention, I've never seen the amount of coffee that's ground to be more than 0.1g off from what I weighed. And it's rare for it to be 0.1g off at all. I usually get back exactly what I weighed.

The retention really is minimal. I've opened the burr chamber once to clean out, and there's practically nothing in there. It's just the usual stuff, where the cutting teeth of the burrs and the screws holding them in have some caked on grounds (like a brush isn't sufficient at disclosing it, instead I used a toothpick). But this is an unavoidable fact of grinding coffee AFAICT (for the cutting teeth at least, obviously if you have blind burrs then you don't have buildup in the screws). Opening up the burr chamber is super easy, just 4 screws.

I can see why an external power supply might bother folks. And I respect that POV. If you want an integrated power supply, this isn't the grinder for you. But it doesn't bother me at all, and bothers me even less than I anticipated. I've set it up so the power supply is out of my way, and I never give it a second thought. I've also set it up so I'm using a wireless power remote to turn on/off the grinder, and in practice, this works super well. I've hidden the remote on the side of the counter on my coffee bar, and it has worked out really well usability wise.

The grounds catch can works well. You can slide it in from any side. I'm not always perfect at sliding it in onto the tracks. Though I've gotten much much better at it. I now do it for the most part without thinking twice. I just ordered a magnetic tumbler from Grafikus on reference from Frank. Excited to try that out, it looks really nice. It's also cool that many of the EK43 accessories should just work with the Nautilus. I think having a magnetic attachment for the grounds catch can will be really nice.